/Engine/Source/Runtime/UMG/Public/Components/DynamicEntryBoxBase.h
Clear out the box entries, executing the provided reset function for each and optionally deleting the underlying Slate widgets entirely as well.
template<typename WidgetT> void ResetInternal ( [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void(WidgetT &)> ResetEntryFunc, bool bDeleteWidgets )